From my experience, soaking a carb is fine as long as all you have is gum, vanish, etc., from old gas. However, if the carb has rust, air leaks, or has partially plugged circuits, it will never run right until you rebuild it properly. The jets must be removed, sometimes they are stuck and the slot will break off or round out since they are brass. But, you need to get them out and then clean with a wire, soak, and use air pressure to make sure all passages are clear. A partial choke to make it run means that it is not drawing enough gas on it's own like it should. This can be several factors. Fuel bowl not set properly, a blockage or partial clog somewhere in the fuel system, an air leak (typically at the choke and throttle shafts), a bad gasket seal between the bowl and the upper carb, etc. I start by making sure that I have a steady and consistant fuel flow.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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